Possible options in a decision often organize as a hierarchy of subdecisions. A recent study concluded that perceptual processes in primates mimic this hierarchical structure and perform subdecisions in parallel. We argue that a flat model that directly selects between final choices accounts more parsimoniously for the reported behavioral and neural data. Critically, a flat model is characterized by decision signals integrating evidence at different hierarchical levels, in agreement with neural recordings showing this integration in localized neural populations. Our results point to the role of experience for building integrated perceptual categories where sensory evidence is merged prior to decision.

译文

决策中的可能选项通常组织为子决策的层次结构。最近的一项研究得出的结论是,灵长类动物的感知过程模仿了这种层次结构,并并行执行子决策。我们认为,直接在最终选择之间进行选择的平面模型对报告的行为和神经数据更为宽容。至关重要的是,扁平模型的特征是决策信号在不同的层次级别上集成了证据,与神经记录一致,表明这种集成在局部神经种群中。我们的结果指出了经验在建立综合感知类别中的作用,在这些类别中,感官证据在做出决定之前就已合并。

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